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    <title>m_circle</title>
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    <center>Scilab Function</center>
    <div align="right">Last update : April 1993</div>
    <p>
      <b>m_circle</b> -  M-circle plot</p>
    <h3>
      <font color="blue">Calling Sequence</font>
    </h3>
    <dl>
      <dd>
        <tt> m_circle()  </tt>
      </dd>
      <dd>
        <tt> m_circle(gain)  </tt>
      </dd>
    </dl>
    <h3>
      <font color="blue">Parameters</font>
    </h3>
    <ul>
      <li>
        <tt>
          <b>gain</b>
        </tt>: vector of gains (in DB). The default value is<ul>
          <li>
            <tt>
              <b>gain</b>
            </tt>=[-12 -8 -6 -5 -4 -3 -2 -1.4 -1 -.5 0.25 0.5 0.7 1 1.4 2 2.3 3 4 5 6 8 12]</li>
        </ul>
      </li>
    </ul>
    <h3>
      <font color="blue">Description</font>
    </h3>
    <p>
      <tt>
        <b>m_circle</b>
      </tt> is used with <tt>
        <b>nyquist</b>
      </tt>.</p>
    <h3>
      <font color="blue">Examples</font>
    </h3>
    <pre>

//Example 1 :
  s=poly(0,'s')
  h=syslin('c',(s^2+2*0.9*10*s+100)/(s^2+2*0.3*10.1*s+102.01))
  nyquist(h,0.01,100,'(s^2+2*0.9*10*s+100)/(s^2+2*0.3*10.1*s+102.01)')
  m_circle();
//Example 2:
  xbasc();
  h1=h*syslin('c',(s^2+2*0.1*15.1*s+228.01)/(s^2+2*0.9*15*s+225))
  nyquist([h1;h],0.01,100,['h1';'h'])
  m_circle([-8 -6 -4]);
 
  </pre>
    <h3>
      <font color="blue">See Also</font>
    </h3>
    <p>
      <a href="nyquist.htm">
        <tt>
          <b>nyquist</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="chart.htm">
        <tt>
          <b>chart</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="black.htm">
        <tt>
          <b>black</b>
        </tt>
      </a>,&nbsp;&nbsp;</p>
    <h3>
      <font color="blue">Author</font>
    </h3>
    <p>S.Steer.;   </p>
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